Self-oiling die-stock.



W. M. & I. S. SHREVB.

SELF OILING DIE STOCK. APPLICATION FILED JUNE 13, 1907.

Patented Dec. 29, 1908.-

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rmiTnn sTaTTs raTnNT oTTTon SELBKOILING: :Dm-STOCK,

Spesoatan of Lettera Batentz Patented Dec; 539,v 1998 Application filedJune-13, 1907. Serial No. 378,837.

T 0 allwho'm 'it may concern:

Be-it known that we, WALTER M. SHREVE and IsAAc S. SHREVE, citizens ofthe United States, residing in Philadehhia, Pennsylvania, have inventedcertain in Self-Oiling Die-Stocks, of which the iol'- mprovements lowingis a specification.

Our invention relates to that class of die stocks 'which are Aprovidedwith a hollow handle constituting a reservoir for the oil which isemployed for lubricating the dies or for application to the rodl or tubeat the point where the dies begin to act upon the saine, the object ofour invention being to insure the proper liow of oil from the reservoirto the dies. This object we attain in the manner hereinafter set forth,reference being had to the accompanying drawing, in which- Figure 1 is asectional view of suilicient of a die stock to illustrate the means em-lployed for conveying the oil from the hollow andle to the dies, and Fig.2 is an enlarged section of said hollow handle as constructed inaccordance with our invention.

In Fig. 1 of the drawing, 1 represents the body of a die stock, whichmay be of any ordinary character, and provided with suitable cuttingdies 2. Screwed into suitable bosses on the body of the stock are thehandles 3 and 4, whereby the same is turned, the handle 3, in thepresent instance, cony stituting a reservoir for the oil which isemployed for lubricating the dies, the oil being conveyed from thehandle to a point in'ad.

vance of the dies by means 'of a passage 5 and a'short tube 6, screwedinto the threaded end of said passage. The handle 3 consists of a tubehaving at its lower end a tubular plug 7, whose under face constitutes aseat for a valve 9, the stem 10 of saidvalve passing up through the plugand haiving, at the top, a disk 11 between which and a seat in the plugis interposed a coiled spring 12, whereby the valve 9 is normallymaintained in close contact with its seat and the escape of oil from thehandle is revented. Screwed into the upper end of tile tube 3 is acylinder 13 containing a piston which is provided with acupleatherpackin 14, the rod 15 of said piston passing throug a stuffing box atthe upper end of the cyllnder and being provided at its upper end with aknob or button 16, between which and the cap of the stuffing box isintroduced a coiled spring 17 tending to raise the piston in thecylinder 13, a protecting tube 19 constituting the outer end ofl thehandle 3 and serving; to inclose the projecting portion of thepistonrod, its knob,

and spring, and thereby prevent depression of the piston by accidentalblows upon the knob.' The piston.. rod 15 hasv a depending stem 20 whichmay, if desired,be connected to the valve stem 10 but which preferablyterminates, at its lower end, in a yoke or bow 21, this bow, when thepiston is in. itsv highest position in the cylinder being disposed atany desired' distance above the disk 11 at the top of the valve stem10..'

Normally, the parts occupy the position shown in Fig, 2, the valve 9being closed and escape of oil from the hollow handle being therebyprevented. Pressure of the thumb or finger upon the knob or button 16,however, will cause downward movement of the piston in the cylinder 13,and the cu eather packing of said piston will fit snugl) to the walls ofthe cylinder so as to prev'ent any leakage of air past the piston,consequently the body of air which is contained between the piston andthe upper surface of the body of oil in the handle will be comressed toa certain extent, and when the bowl 21 iinally contacts with the disk 11and depresses the latter so as to o en the valve 9, lthis pressure ofair behind t e body of oil containedv in the handle will insure thedischarge of a jet of oil between the valve and its seat, the pistonbeing raised by the action of the s ring 17 as soon as pressure isremoved rom the knob 16,- and the valve 9 being likewise raised by its sring 12 as soon as the pressure of the bow 21 1s removed from the disk11 as said bow 21 rises with the piston.

We claim 1. The'combination of a die stock ,with a hollow handleconstituting'v an oil reservoir and having a valved opening at its innerend, a tightly fitting piston in the handle, means for normallyy closingthe valve, and a connection between the valve and piston whereby saidvalve -will be o ened independently of the pressure of the oi thereuponwhen the piston is depressed.

2. The combination of a die stock with a hollowhandle constituting anoil reservoir and pressing said piston.

3. The combination of a die stock with a hollow handle constituting anoil reservoir and having a valved opening at its inner end, means fornormally closing said valve, a piston contained in the handle,and'rneans, normally free from connection with the valve, for impartingmovement of said piston to the valve independently of the pressure ofthe oil thereupon.

4. The combination of a die stock with a hollow handleconstituting anoil reservoir, a valve closing the inner end of said handle and having astem with disk and spring acting thereupon to normally close the-valve,a tightly itting piston contained in the handle, and a rod dependingfrom said piston, and serving, by Contact with the valve-stem disk, toopen the valve.

5. The combination of a die stock with a hollow handle constituting anoil reservoir j eoting therefrom, a knob or button on said rod, a springfor raising the same, and a protecting tube surrounding. the button butopen at the outer end to permit access to the same.

6. The combination of a die stock with a hollow handle constituting anoil reservoir, a springpressed valve normally closing the inner en ofthe handle, a spring-raised piston in the handle, and means normallyfree from connection with the valve whereby inward movement of thepiston will effect opening movement of the valve independently of thepressure of the oil thereupon.

ln testimony whereof, we have signed our names to this specification, inthe presence of two subscribing witnesses.

'WALTER M. SHREVE. ISAAC S. SHREVE.

Witnesses:

FLEETwooD FULMER, ELMER E. E. SHIELDs.

